Executor is a small but perfectly functional Java (1.5 or higher) JAR executable that is used to run programs in shared computer resources like a pool of computers that you and your friends own. Moreover, it can be used as a simple file sharing program: you can access the files of your home computer from your office computer.
Executor uses a shared or synchronized file system. The user creates a task in one computer (just by uploading a file), and another computer that has the required program will execute the task.
